under communism, speaking out against government was forbidden, so graffiti was a form of political protest. when john lennon was killed in 1980, young people again turned to graffiti. to them, lennon stood for peace and artistic freedom. writing on the wall helped them express their sadness over his death as well as their own yearning to be free. although the authorities tried to stop the graffiti, they couldn't. >> under communism, they'd paint it every night to squash the protesting, and it would be interesting because they would continue to come back every day and still write. >> now the czech republic is a free country. people can say and write what they want. the lennon wall has become a popular place where everyone, including reporters from "teen kids news," is welcome to leave their mark. >> you can't kind of step back and take a picture of the whole thing. it's better to just slowly look at it and look at each little detail, 'cause there's just so many different things and sometimes you can miss some things. >> china has the great wall. jerusalem has the wailing wall. prague has th